Flanged article



E. C. GEORGE.

LLLLLLLLLLLLL E.

2 SHEETS-SHEET 2.

guy/1A this invention, ythe within anothe vulsu'rr-:D STATES PATENT. oFFicrz.

EDGAR C. GEORGE, 0F NRWOD, OHIO, .AS-SIGNOR- T0 ALLIS-CHA'MES MANUFAC- WISCONSIN, A CORPORATIGN 0E DELAWARE..

TUBING COMPANY, 0F MILWAUKEE,

FLANGED Annen?.

Specification of Reissued Letters Patent.

Reissued Aug. 8, 1922. JJ'anu'ai'yl27, 1915. Application for reissue filed July 15, 1921. Serial No. 485,041.

To all whom it may concern.' Be it known that EDGAR C. GEORGE, a citi- `zen of the United7 States residing at Norwood, in the county of I-Iamilton and State -of Ohio, has invented a. certain new fand useful Improvement in Flanged. Articles, of which the following 4is a specification. 4

This invention relates in general to articles of manufacture wherein a body portion is provided with one orvmore flanges.

In certain cases, as, for instance, where one member is to be insulated from a second member through which the first member passes, it is often desirable to use a flanged tubular element as the insulating medium between the parts. Where the insulating bushing is flanged at both ends and is to be used for insulating telescoping -conducting members, it is necessary that at least one flange be secured to the body portion after the conducting members are in place one Further, where the flanges cannot be cast or formed integrally with the body portion of the bushing, the method of forming the flanged bushing and the character of the union between the flange and the body portion are important factorsv in determining the mechanical and insulating properties of the finished article.

It is an object of this invention to provide an improved construction of an article of manufacture comprising a flanged body portion. It is a further object of this invention to provide an improved construction of an art1- .cle of manufacture comprising a body portion provided with flanges at both ends.

It is a further object of this invention to providean improved construction of a flanged bushing; l It is a further ob'ect of this invention to provide 'an improve method of producing a flanged article. p

It is a further object of this invention to provide an improved method of producing a flanged insulating bushing.

These and other objects are attained by vallous novel features of which will appear from the description and drawings, disclosing one y embodiment of such invention, and` will be particularly pointed out in the claims.

In the accompanying drawmgs:

Figure ,1 is a sectional view through a `terial from which vfrom the portion of a dynamo-electric machine' showing a flanged insulating bushing embodying features of this inventlon 'and used to insu-y late a brush rod and its securingmeans from a support,

F1g. 2 is a fragmentary sectional view of the body portion of the .bushing shown in Fi 1. v

ig. 3 is an elevation of a section of mathe flange portion of the bushing is formed.

Figs. 4 and 5 are partial sectional elevations of apparatus used in forming the flange portions of the bushing shown in 'Fig 1, and illustrates steps in the process of manufacture of such flange portions.

Fig. (i is av view similar to Fig. 1 showing a modified form of flanged bushlng.

Fig. 7 is a fragmentary sectional view of gie body portion of the bushingshown in i [6. I i

igs. 8, 9 and -10 are partial sectional elevat1ons of apparatus used in forming the flange portions of the bushing shown in Fig. 6, and illustrate steps in the process of manufacture of such flange portions.

Figs. l1 and 12 are vations of apparatus used in forming the flange portions of the'bushin of Fig. 1, and illustrate steps in 'a mod-i ed process of manufacture of such flange port1ons.

In the drawings, the invention is shown as embodied in a flanged bushing of a type useful for insulating a member from a second member-.through which the first member passes. As shown in Fig. l, a member 10, usually associated with the `frame of a dynamo-electric machine, acts as a supportis used for supporting..

for a rod 11, such as brushes, the rod passing through an opening 12 in the support 10 and being insulated support by a bushing 13'ofinsulating material. This b tubular body portion 14 and flanges 15 asso-y ciated with the ends of the body portionlel. The rod 11 is held in place relatively to the support 10 by means of nuts 16 en with'threaded portions l.of the rod an bearing upon the flanges 15 throughv the intermediar7 ofy washers 17, the bushing being of such length that the flanges 15 are in contact with the sides of the support 10 adjacent the bore 12.

ushing comprises a f aging The end portions-of the body portion `14'` of the bushing are internally flared or beveled, as indicated at 18 in Fig. 2, and the flanges are provided with tubular extensions 21, tapered or beveled on their outer sides to fit within the ends of body portion 14 and to engage with the flared or beveled portions 18 thereof, the inner diameter of the body portion and of the tubular exten- .sions of the flanges being' the same.

In the manufacture of the flanges 15 of the bushing 13, a section of material 19, of a size and thickness equalto those of the flange desired, is made up,` preferably, of layers of paper or other suitable insulating material impregnated with a suitable adhesive insulating material. lThis section of material is partially dried and is c ut to the desired form and starred, as indicated in Fig. 3, by making through incisions at about the center thereof which form partially cut sectors 20, the'radial length of the beveled end 30 passing through the starred portion and 4folding back the partially cut sectors 20, as indicated in Fig. 4. Continued movement of the core relatively to the mold causes the cylindricalv die portion 29 to pass vthroughthe disk 19, this action forcing the portions 20 of the disk back .against vthe wallsof the flared bore 26and displacing such portions to form the tubular extension 21, as indicated in Fig. 5. v Stated in other words, the material of the portions 20 of the disk is caused .to flow, the layers or particles shifting with respect to each other, and thus the gaps .said portions are substantially filled. The

gages the upper c'ore is preferably moved to such position that'the under side of the body part 28 enside of the part 19. These lparts may be drawn to such position and eld therein, as by a nut 301 which may enjgage a threaded portion 31 at the lower end of the die portion 29. The -com letely formed flange is preferably baked w ile in the mold, and, when the same is sufiiciently hardened the core and mold are separated and the flange removed.

In assemblin the bushing, the body por- ,tion` 14 and t e 4two oppositely disposed flanges may beveled portion 18 of the body portion bein treated with a suitable adhesive material o an insulating character, preferably a heavy .bakelite varnish being used. T-heoflanges ,adhesive material used between the beveled `to cement the flanges to the body portion,

tion 24, the mold portion 24a being provida die portion 29a of such diameter as to fit between the tapered ends of the partiall be passed over 4the rod-11, the .and the beveled end 30' and the die portion 15 may then be clamped in positions with the. axial extensions 21 forced against the beveled portions 18, the securing nuts 16 and Washers 17 being used for this purpose. With the parts 'of the bushing in position and the dynamo-electric machine being otherwise ready for operation, a test run is started, heat developed during the heat run of the machine being slifiicient to `harden the portions of the body portion and flanges and giving a finished article having the required mechanical and dielectric properties.- The heat used to bake the bushing during the heat run of the machine may, for example, be that due to current flowing in the brush rod on which the bushing is mounted.

vThe modified form of bushing 133- shown in Fig. 6 comprises a body portion 14aL having its endsv externall tapered or beveled, as indicated at 18a in Fig. 7, and flanges 15a provided with axial tubular extensions 21Il that are internally beveled or flared to fit the beveled portions 18a of the body portion 14a. In forming the flanges 15a of the bushing 13, sections of material 19, similar to the sections v19 used for formin the flanges 15 of the bushing shown in ig. 1, are used. A section of material or disk 19?* is placed on the upper side of a mold -portion 24a, which -is in turn disposed upon a mold pored with a cylindrical bore 25b of a diameter equal to the outer diameter of the axial extension 21a of the finished flange, and the mold portion 2 4 being provided with a cylindrical bore 25" of a diameter equal to the inner diameter of the finished bushing.y A core portion 27a comprises a body portion 28* from the under side of which projects a die portion 32 of such diameter as to fit close within the bore 25, and

close within the bore 25",-the 'two die portions being connectedby abeveled portion 34, and the die vportion 29a being provided with a beveled end 30a. The beveled end '30? and the die portion 29 Vof the core are forced through the disk 19*il to fold back t cut sectors 20 to the general position in then removed and the mold portion'll and the disk 19l are inverted, tfe disk being disposed between the mold portions 24* and 24b which are arranged with the axes ofV their bores in alinement, and the portions4 20 occupying the bore 25, the relative psition of the parts being that indicated in Fig.9. The core is then forced downward 29 passed-through the bore 25 of the mold portion 24", the beveled die portion 3ftpressing the partially cut sectors 20 back against icated in Fig. 8. The corel is the wall of the'y bore 25*,gi.ving these sectors the form of an internally'beveled tubularv extension-21, as shown in Fi 10. The core may be drawn to this ypos1tion and held therein, as by means of a nut 301 engaging a threaded portion 31a of the die portion 29a. The formed flange may be baked While in the mold,'and when the same is sufliciently baked, the core and molds are separated and the flange removed.

The flange and body portions of the bushing 13a may be assembled on the brush rod of a dynamo-electric machine in the manner described in connection with the bushing 13l shown in F ig'. 1, and the heat developed during a heat run will be. suicient to `thor oughly cement, the parts together, giving a finished article of very high mechanical and dielectric strength.

' As indicated in Figs. 11 and v12, flange 15 l may also be formed by pressing over the die yportions29 and 30, preferably With these parts in position inverted relative to that of Figs. 4 and 5, the required number of pre- .pared sheets or layers of material'of the A,same form as indicated at 19in Fig. 3 and starred to provide uncut sectors 20, individual sheets or layers being designated by 191 and by usingpthe mold portion 24 to follow up these layers, these operations amounting fo a substantial reversal nof the steps of the method first described. The mold portion 24 ma be urged by the nut 301 to such positiont at the uncut sectors 20 are forced to occupy the flared portion 26 of the bore'25. The core and mold portionsmay be suitably heldy in the 'proper position, as by the nut 301, and the formed. flange may be baked.

with the parts in these positions.

Again,flanges may be formed in another Way, as by being molded from 'a plastic insulating material and baked While in the mold, and the finished flanges may be then cemented to the body portion of the ,bushing as generally described above.

'It will be .obvious that, in accordance with this invention, a flanged article-is provided which is comparatively simple and cheap to .manufacture, and4 is possessed of great mechanical strength, due to the increased bearing ofthe tubular extensions ofthe flanges on the beveled ends of theb'ody portion, one of the parts being insertedwithin another and being cemented thereto along the entire en aging' surfaces.

gt should be understood that it is not desired that the claims be limited to the exact details of construction shown and described,

for obvious modifications will occur to ,aY

person skilled in the art. v

It is claimed and desired to secure byLetters Patent: 1. A method of forming a flanged insulating bushing which comprises forming a tubular body portionv with beveled ends, dis:

torting sheets of insulating material toprovide flanges having oppositely beveled,

axial, tubular extensions and uniting saidl flanges to said body portion With beveled sur aces of the parts inengagement.

2. A method of forming a flanged insulating bushing which comprises forming a tubu ar body portion with beveled ends, distorting a sheet of insulating material torprovide a flange portion having an oppositely beveled, axial, tubular extension, and uniting said oppositely beveled parts with the beveled surfaces thereof in engagement.

3. A method 'of forming an article ofV manufacture which comprises making through incisions in a laminated sheet of material,I pressing back the, material between said incisions at approximately right angles to the body of the sheet, and distorting the pressedba/ck material to form acontinuous, tubular, beveled extension.

4;. A method of forming a flanged insulatin ,bushing `Which comprises forming a tubu ar body portion with a beveled surface,

4 forming a flange with an oppositelyl beveled surface, assembling said body and flange portions on a conducting element with said beveled surfaces adjacent each other and a cementitious material therebetween, and passing an electriccurrent through said con? ducting element to bake said cementitious material and cement said body and flange portions together.

5. A method of forming a flanged insulating bushing which comprises forming a. tubular body portion With beveled ends, forming flanges havingaxial, tubular extensions beveled oppositely to the beveledk ends of said bod portion, assembling said body portion and7 flanges on a conducting element with the beveled surfaces ofthe body portion and flanges immediately adjacent each other, and cementitious material therebetween,

cementitious materialH and cement the portion and flanges together.

'6'. A method of'forming a flanged insulating bushing which comprises forming a tu' bular element with a beveled end portion, forming a second tubular element With an body .oppositely beveled end portion and a radial flange, assembling said tubular elements on an element of electrically conductive mate-v rial with said oppositely beveled surfaces closely adjacent each other 'and a layer of cementitiousmaterial between said surfaces, and causing 'ank electric current to flow through said conductive element to bake said cementitious material and unite said^tu bular elements.

7 .-A' method 'of forming an insulating bushing which comprises forming tubular' elements with oppositely beveled end portions, assembling said tubular elements on and passing an electric .current through the conducting element to bake said anV element of electrically conductive material with said oppositely beveled surfaces closelyadjacent each other and a layer of cementitious material between said surfaces, and causing an electric current to flow through said conductive elementto bake said cementitious material and unite said tubular elements. y Y

8. A method of forming a flanged article which comprises beveling an end portion of said article, distorting a piece of sheet material to form a flange portion having an axial extension with a bevel opposite to that of said lirstportion and uniting-said portions with said axial extension extending toward the opposite end of said article and the beveled surfaces of the parts ini engagement.

9. AV method of forming an article of manufacture which comprises puncturing a sheet of-flowablel hardenable material thereby causingthe parts adjacent said puncture to be lbent at an angle to said sheet and whereby said parts are given a tapering cross-section in the general directionof their length, and then hardening the flowable material.

10. As an article of manufacture, a bush- L.

ing comprising a tubular portion having a beveled end and at least one flange comprising a laminated sheet of material having an integral tubular beveled extension to coact with the said beveled end of the body portion.

11. As an article of manufacture, a bushing comprising a tubular portion and two end-flanges Vmade of a laminated sheet of material, said tubular portion comprising integral tubular beveled extensions on said flanges.

12. As an article of manufacture, a {langelike member comprising a unitary piece of laminated material, said member havingY an aperture bounded by an integral tubular extension, each lamina of said material extending throughoutl said member and into its extension.

13. As an article of manufacture, a flangelike member comprising a unitary piece of laminated insulating material, said men-Jer having a'n aperture bounded by an integral tubular extension, each lamina of said material extending throughout said member and into its extension.

14. As an article of manufacture, a flangelike member comprising a unitary piece of laminated material, said member having an aperture bounded by an integral tubular beveled extension, each lamina of said ma.-y

terial extending throughout said member and into its extension.

1.5. As an article of manufacture,a flangelike member comprising a unitary piece of laminated insulating material, saidl member havingl an aperture bounded by an integral sheet of flowable insulating material so that the edge-portions of the perforation areindented and bent at an angle to said sheet, and compressing said edge-portions so that the said portions will become substantially non-indented.

' 18. A methodV of forming an article of manufacture which comprises perforating a sheet of Howable laminated insulating material so that the edge-portions of the perforation are indented and bent at an angle to said sheet, and compressing said edgeportions so that the said portions will ,be-J

come substantially non-indented.

' 19. A method of forming an article of manufacture which comprises perforating a sheet of flowable laminated vmaterial so that the edge-portions of the perforation are indented and bent at an angle to said sheet, and compressing said edge-portions so that the said portions will become substantially non-indented and form a beveled tubular extension.

20. method of forming an article of manufacture which comprises puncturing a sheet of flowablev laminated material thereby causing the vparts adjacent said puncture to be bent at an angle to said sheet, and compressing said parts to cause them to flow to form a substantially continuous tubular extension.

21. As an article of manufacture, an insulating member comprising portions having plane and curved surfaces respectively, said member being composed of slitted laminae cut from sheet stock, said laminas khaving their slitted portions bent to form a curved-surface portion of said member, and i binder for holding said laminae together and in desired bent formation.

22'. As an article of manufacture, an insulating member comprising plane and cylindrical portions respectively, said member being composed of slitted laminae cut from sheet stock, said laminae having their slitted portions bent to form a cylindrical, portion of said member, and a binder for holding said laminas 'together a'nd in desired bent formation. l

23. As an article of manufacture, an insulating member comprising portions having plane and curved surfaces respectively, composed of slitted laminas cut from sheet stock, said laminas having their slitted .por-4 tions bent to-form a curvedfsurface portion of said member, the slitted portion of each individual lamina forming a serrated edge, the serrations of the individual laminas being staggered in the finished article to form a substantially continuous surface, and a in desired bent formation.

24. As an article of manufacture, an insulating member comprisingplane and cylindrical portions respectively, composed of slitted laminas cut from sheet stock, said laminas havin ltheir slitted portions bent to form a cylin rical portion of said member, the slitted portion of each individual lamina formin the in ividual laminas being staggered in the finished article to form asubstantially continuous cylinder, and a binder for holding said laminas together and inL desiredv bent formation.

25. As an article of manufacture, an insulatingmember having a predetermined configuration in three dimensions, said member being composed of a stack of similal slitted laminas cut from sheet stock, said laminas having their slitted portions bent to form a portion of lsaid member, and a binder for holding saidflaminae together and in desired bent formation.

26.- As an article ofmanufacture, an in.- s'ulating member having `a predetermined configuration in three dimensions, said member being composed of a stack of similar slitted laminas cut fromsheet stock, said laminae having their slitted portions bent to form a portion 0f said member, the slitted portion of each individual lamina forming a serrated edge, the serrations of the indibinder for holding said laminaetogether and -vidual laminas being staggered in the finished article to form a substantially continuous surface, and a\binder for holding said laminas together and in desired bent formation.

27. As an article of manufacture, an insulatingI member f having portions at an angle to each other, said member being com- `posed of a stack of similar slitted lamin out from sheet stock, at least` one of the portions of said .member being formed by the slitted portions of said lamin, and a binder 'for holding said laminas together and said portionsl in desired angular relation.

2 As an article of manufacture, an insula ing member having portions at an angle to each other, said member being composed of a stack of similar slitted laminas cut from sheet stock, yatleast one vof* the portions of said member being formed by the slitted ortions of said laminas, the'slits of the individual laminas being staggered in the finished article, and a binder for holding said laminae together and said portions in desired angular relation,

a 4serrated edge, the ser-'rations of 29. As an article of manufacture, an insulating member- `composed of a stack of similar slitted laminae cut from plane sheet stock, said laminas being bent out of said plane in the finished article, and a binder for holding said laminas together and in desired bent formation.

30. As an article of manufacture, an insulating member composed of a stack of similar slitted lamin cut from plane sheet stock, said laminee being bent out of said planeA in the finished article, the slits of the individual laminae being staggered in the finished article, and a binder for holding said laminae together and in desired bent formation. A

31. As an article of manufacture, a flangelikel member composed of slitted laminas cut from sheet stock, said member having an aperture bounded by an integral tubular extension formed by the slitted l portions of said laminas, and a binder for holding said laminae together and in desired formation.

32. As an article of manufacture, a flangelikeinsulating membercomposed of slitted laminae cut from sheet stock, said member havingV an aperture bounded by an integral tubular extension formed by the slitted portions of said laminee, and a binder for holding said laminas together and in desired formation'. v

33. ,As an article of manufacture, Ya flangelike member composed of slitted laminaecut from sheet stock, said member vhaving an aperture bounded by an integral tubular beveled extension formed-by the 'slitted portions of said laminas, and a binder for holding said laminae together and in ydesired formation.

34. As an article of manufacture, a Hangelike insulating member composed of slitted laminas cut from sheet stock, said member having an aperture bounded by an integral tubular beveled extension formed by the slitted portions of said laminas, and a binder for holding said lamin together and deticle of manufacture out of sheet stock which comprises cutting laminas from sheet stock and forming said amin with slits in deslred places and of desired extent, Asaid dimensional article having continuous sur` lamina'e being taken in suicient-number andstacked up to give the desired thickness toVY said article, bending said slitted portions of hardenable binder.`

said laminae to a desired configuration, and holding said laminae together and in desired bent formationbya suitable heat-hardenable binder, whereby a three-dimensional article having continuous surfaces is formed,

37. A method of. forming a laminated ar- .ticle of manufacture out of sheet Stock,

which comprises cutting lamina: from sheet stock and forming said laminae with slitted edge-portions, said lamin being taken in sulicient number and stacked up to give the desired thickness to said article, bending said edge-portions to a desired configuration, and holding said laminas together and in desired bent formation by a suitable binder, whereby a three-dimensional article having continuous surfaces is formed.

'38. A method of forminga laminated article of' manufacture out of sheet stock which comprises cutting laminee from sheet stock and forming said laminae with slitted edge-portions, said laminae being taken in sufficient number and stackedup to give the desired thickness to said article, bending saidl edge-portions to a desired configurationand holding said laminas together and in desired bent formation by a suitable heat-hardenable binder, whereby a threefaces is formed. Y

39. A method of forming a laminated article of manufacture out of sheet stock which comprises cutting laminae from sheet stock and forming said lamin with slitted t ledge-portions, bending said edge-portions to form a` continuous tubular `aextension, and holding said l-aminae together and in desired Y `bent formation by a suitable binder.

40. A method of forming a laminated article of manufacture out of sheet stock which comprises cutting laminas from sheet stock and forming said laminae with slitted edge-portions, bending'said edge-portions to form a continuous tubular extension, and said laminas together and in de holdin sired nt formation by a` suitable heathardenable binder. -i

,41. A method of forming a laminated article ofV manufacture out of sheet stock which comprisescutting laminas from sheet stock and forming said lamin with slitted edge-portions, bending said edge-portions to form a continuous tubular beveled eX- tension, and holdin said -laminae together and in desired bent orination by a suitable binder. y V

42. A method of forming a laminated ar-V ticle of manufacture out of sheet /stock which comprises cutting laminaeffrom sheet stock and forming said Alaminae with slitted edge-portions, bending said edge-portions to form `a continuous tubular beveled extension, and holding said laminee together and in desired bent formation by a suitable heat- 43. An insulating member for 'electrical `apparatus Qhaving' plane and cylindrical portions composed of slitted washers cut from sheet stock of b-rous material, lsaid washers having their slitted portions "bent to form a cylindrical portion of said member, and a binder of resinous material applied to said washers which is forced by heat and y pressure into intimate'contact with the fibrous structure for retaining said washers in conformed relation in the finished product. v

44. A flanged insulating ring composed Iof disks cut from sheet stock material and having slitted edges permitting said disks to be bent into a predetermined configuration without buckling, said `disks being taken in suicient number to makea ringof predetermined thickness and varranged to have their slits staggered, and aresinous binder forced into intimate contact with the material of said .disks uniting said disks in the finished product.

45. `The`method of producing alaminated article of manufacture having a. plane portion and a substantially cylindrical continuous portion assembled from initially plane laminas and wherein the individual laminae extend throughout said plane portion and into said cylindrical portion, and

vin said cylindrical portion are circumferentially. discontinuous and staggered with reioo spect yto the discontinuities of the other laminae, which comprises distorting the initially vplane laminas to form saidvsubstantially cylindrical continuous portion.

46. The method of producing a laminated article of manufacture having a plane por- 'tion and a beveled substantiallyv cylindrical continuous portion assembled from initially plane laminae and wherein the individual ylaminee extend throughout said plane portion and into said cylindrical portion, and in said cylindrical portion are circumferentially discontinuous and staggered with respect to the discontinuities of the other laminae, which comprises distorting the initially p-lan'e laminas to form said beveled substantially cylindrical continuous por-- tion.

47. yThe method of producing a laminated article of-manufacture having a pla-ne portion and a curved continuous surface portionA assembled from initially plane laminae and wherein the individual laminas extend throughout said plane po-rtion and into said curved surface portlon, and in said curved surface portion are dlscontinuous in a given direction and staggered lwith respect to the discontinuities ofl the other 1aminae,`which comprises distorting the initially plane laminae to form said curved continuous surfacey portion.

48. The method of producing a laminated article of manufacture having a plane portion and a beveled curved continuous surface portion assemb-led from initially plane laminae and wherein the individual laminae extend t-hroughout said plane portion and into said curved surface portion, and in said curved surface portion are discontinuous in a given direction and staggered with respect to the discontinuities of the other laminas, Which comprises distorting the initially plane laminee to form said beveled curved continuous surface portion. 49.v The method of forming a laminated article of manufacture including a substantially cylindrical continuous po-rtion and a plane portion, each lamina extending throughout said plane portion and into said cylindrical portion, which comprises slitting the laminae, and bending the slitted portions to form said substantially cylindrical continuous portion.

50. The method of forming a laminated article of manufacture including a beveled substantially cylindrical continuous portion and a plane portion, each lamina extending throughout said plane portion and into said cylindrical portion, which comprises slitting the laminae, and bending the slitted portions to form said beveled substantially cylindrical continuous portion.

51. A method of forming a laminated article of manufacture out of sheet stock Which comprises cutting laminas from sheet stock and forming said laminae with slitted y edge-portions, bending and compressing said edge-portions kto form a continuous tubular beveled extension, and holding said laminae together and in desired'bent forma- EDGAR C. GEORGE. 

